CN114698153A

CN114698153A - Method and device used in sidelink wireless communication

Info

Publication number: CN114698153A
Application number: CN202011577708.5A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2022-07-01
Anticipated expiration: 2040-12-28
Also published as: CN114698153B

Abstract

A method and apparatus used in sidelink wireless communications is disclosed. The first node maintains a first timer; sending a first indication to an upper layer in response to expiration of the first timer; the first indication is used to release a first set of radio resources; the action maintaining the first timer includes: starting or restarting the first timer when receiving or transmitting a data packet belonging to a first logical channel set; the counting of the first timer is not influenced by receiving or sending a data packet belonging to a second logical channel set; at least one logical channel of the first set of logical channels is associated to one radio resource of the first set of radio resources, and none of the logical channels of the second set of logical channels is associated to one radio resource of the first set of radio resources. The method and the device can achieve the beneficial effect of service isolation.

Description

Method and device used in sidelink wireless communication

Technical Field

The present application relates to methods and apparatus in a wireless communication system, and more particularly, to methods and apparatus for managing radio resources through a data inactivity monitoring function in sidelink wireless communication.

Background

In Uu air interface transmissions, a User Equipment (UE) may be configured with a data inactivity monitoring function that may release an established radio bearer connection if no data is received or transmitted for a period of time.

For the rapidly developed V2X (Vehicle-to-evolution) service, the 3GPP (3rd Generation Partner Project) started SL (Sidelink) standard formulation and research work under the New Radio (NR) framework, and decided to start SI (Study Project) standardization work for NR SL Relay on #86 global meetings of 3GPP RAN (Radio Access Network).

Relay (Relay) is a multi-hop transmission technology, which can improve throughput and coverage. Relay communication is a common method in cellular network communication, and data of a source node reaches a remote node through forwarding of a Relay Node (RN). The source node and the remote node are usually a base station device and a user device, and may be both user devices; the relay node may be a network device or a user equipment. Taking the sidelink transmission in the LTE (Long Term Evolution ) system as an example, the transmission from the user equipment to the relay node adopts a sidelink air interface technology, and the transmission from the relay node to the base station (eNodeB, eNB) adopts an LTE air interface technology. The RN is used for data forwarding between the UE and the eNB, and may be IP (Internet Protocol) Layer forwarding or Layer 3Relay (Layer 3Relay/L3 Relay).

Disclosure of Invention

The inventor finds through research that in sidelink communication and/or sidelink relay communication, a UE may have one or more radio bearer sets, each radio bearer set comprising a set of radio bearers and corresponding to a source layer 2identity (source layer-2identity) and destination layer 2identity (destination layer-2ID) pair (pair). Taking the relay node as an example, the relay node may forward data to the remote node for the source node, and meanwhile, there may be a service between the relay node and the remote node. At this time, the remote node may maintain two sets of radio bearers simultaneously, one of which is the set of radio bearers for the remote node and the relay node, and the other of which is the set of radio bearers for the remote node and the source node. For a scenario with multiple radio bearer sets, how to maintain radio resources included in the multiple radio bearer sets respectively needs to be studied.

In view of the above problems, the present application discloses a solution for maintaining radio resources through a data inactivity monitoring function, which releases radio resources and radio bearers corresponding to a group of logical channels when there is no data transmission on the group of logical channels within a configured time interval, and does not affect radio resources corresponding to other groups of logical channels, thereby solving radio resource management under the condition that one UE has multiple radio bearer sets. Without conflict, embodiments and features in embodiments in a first node of the present application may be applied to a second node and vice versa. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict. Further, although the original intention of the present application is to target the relay and terminal scenario, the present application is also applicable to the relay and the base station, and achieves similar technical effects in the relay and terminal scenario. Furthermore, adopting a unified solution for different scenarios (including but not limited to V2X scenario and terminal to base station communication scenario) also helps to reduce hardware complexity and cost. In particular, the terms (telematics), nouns, functions, variables in the present application may be explained (if not specifically stated) with reference to the definitions in the 3GPP specification protocols TS36 series, TS38 series, TS37 series.

The application discloses a method in a first node used for wireless communication, characterized by comprising:

maintaining a first timer;

sending a first indication to an upper layer in response to expiration of the first timer; the first indication is used to release a first set of radio resources;

wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity; the action maintaining the first timer includes: starting or restarting the first timer when receiving a data packet belonging to a first set of logical channels; starting or restarting the first timer when transmitting a data packet belonging to the first logical channel set; the counting of the first timer is not influenced by receiving or sending a data packet belonging to a second logical channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to a radio resource of the first set of radio resources, none of the logical channels of the second set of logical channels is associated to a radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to the first node.

As an embodiment, the present application is applicable to at least one of a relay node or a remote node.

As an embodiment, the present application is applicable to UE-to-base station relay transmission, or UE-to-UE relay transmission, or base station-to-UE relay transmission.

As an embodiment, the present application is applicable to UE-to-UE, or UE-to-RSU (Road Side Unit), or RSU-to-UE sidelink transmission.

As an embodiment, the problem to be solved by the present application is: in sidelink communication and/or sidelink relay communication, a UE can establish multiple radio bearer sets through multiple RRC connections, and how to independently maintain radio resources and RRC connections included in the multiple radio bearer sets of the UE.

As an example, the solution of the present application comprises: a data inactivity timer is introduced for a set of radio bearers, the operation of the data inactivity timer is controlled by receiving or sending data packets belonging to the set of radio bearers, and the radio resources comprised by the set of radio bearers are released when the data inactivity timer expires.

As an embodiment, the beneficial effects of the present application include: when one UE has a plurality of radio bearer sets respectively corresponding to different RRC connections, a data inactivity timer is introduced into each radio bearer set, so that the state of each radio bearer set can be independently monitored, and the beneficial effect of service isolation is achieved.

According to one aspect of the application, comprising:

in response to receiving the first indication, releasing the first set of radio resources.

According to one aspect of the application, comprising:

sending a first signaling;

wherein the first indication is used to trigger the first signaling used to indicate the release of the first set of radio resources.

According to one aspect of the application, comprising:

at least one logical channel of a third set of logical channels is associated to one radio resource of the first set of radio resources;

wherein any logical channel in the third set of logical channels is mapped to one logical channel in the first set of logical channels; the first set of logical channels and the third set of logical channels are both configured to the first node.

According to one aspect of the application, comprising:

receiving first information indicating a first expiration value of the first timer;

wherein the first timer is updated every first time interval while the first timer is running.

The application discloses a method in a second node used for wireless communication, characterized by comprising:

receiving first signaling, the first signaling being used to indicate a release of a first set of radio resources;

wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity; in response to expiration of the first timer, a first indication is sent to an upper layer; the first indication is used to release the first set of radio resources, the first indication being used to trigger the first signaling; said first timer is started or restarted when a data packet belonging to a first set of logical channels is received; said first timer is started or restarted when a data packet belonging to said first set of logical channels is transmitted; the counting of the first timer is not influenced by the receiving or sending of a data packet belonging to the second logical channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to a radio resource of the first set of radio resources, none of the logical channels of the second set of logical channels is associated to a radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to a sender of the first signaling.

According to one aspect of the application, comprising:

releasing a portion of layer 2 entities in the first set of radio resources in response to receiving the first signaling.

According to one aspect of the application, comprising:

wherein any logical channel in the third set of logical channels is mapped to one logical channel in the first set of logical channels; the first set of logical channels and the third set of logical channels are both configured to the sender of the first signaling.

The present application discloses a first node for wireless communication, comprising:

a first receiver to maintain a first timer;

a first transmitter for transmitting a first indication to an upper layer in response to expiration of the first timer; the first indication is used to release a first set of radio resources;

The present application discloses a second node for wireless communication, comprising:

a second receiver that receives first signaling used to indicate release of a first set of radio resources;

As an embodiment, the RRC Connection (Connection) in this application includes one of Uu RRC Connection (Connection) or PC5 RRC Connection (Connection), unless otherwise specified.

As an embodiment, the RRC signaling in this application includes one of Uu RRC signaling or PC5 RRC signaling, as not particularly described.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 illustrates a transmission flow diagram of a first node according to an embodiment of the present application;

FIG. 2 illustrates a schematic diagram of a network architecture according to one embodiment of the present application;

figure 3 illustrates a schematic diagram of radio protocol architecture of a user plane and a control plane according to one embodiment of the present application;

FIG. 4 illustrates a hardware module diagram of a communication device according to one embodiment of the present application;

FIG. 5 illustrates a wireless signal transmission flow diagram according to one embodiment of the present application;

FIG. 6 illustrates a first node process flow diagram according to one embodiment of the present application;

FIG. 7 illustrates a flow diagram for maintaining a first timer according to one embodiment of the present application;

FIG. 8 illustrates a relationship diagram of a first set of logical channels and a second set of logical channels according to an embodiment of the present application;

fig. 9 illustrates a wireless protocol architecture diagram of relay transmission according to an embodiment of the present application;

FIG. 10 illustrates a block diagram of a processing device in a first node according to one embodiment of the present application;

fig. 11 illustrates a block diagram of a processing device in a second node according to an embodiment of the present application.

Detailed Description

The technical solutions of the present application will be further described in detail with reference to the accompanying drawings, and it should be noted that the embodiments and features of the embodiments of the present application can be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a transmission flow diagram of a first node according to an embodiment of the present application, as shown in fig. 1.

In embodiment 1, the first node 100 maintains a first timer in step 101; sending a first indication to an upper layer in response to expiration of said first timer in step 102; the first indication is used to release a first set of radio resources; wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity (entity); the action maintaining the first timer includes: starting or restarting the first timer when receiving a data packet belonging to a first set of logical channels; starting or restarting the first timer when transmitting a data packet belonging to the first logical channel set; the counting of the first timer is not influenced by receiving or sending a data packet belonging to a second logical channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to a radio resource of the first set of radio resources, none of the logical channels of the second set of logical channels is associated to a radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to the first node.

As an embodiment, the first timer is configured by a base station.

As one embodiment, the first timer is preconfigured.

For one embodiment, the first timer is maintained at the first node.

As one embodiment, the first timer is maintained at a higher layer.

As an embodiment, the first timer is maintained in a MAC (Media Access Control) sublayer.

As an embodiment, the first timer is maintained in an RLC (Radio Link Control) sub-layer.

As one embodiment, the first timer is a datainactivity timer.

As one embodiment, the first timer is e2 e-datainactivtytimer (end-to-end-data inactivity timer).

As one embodiment, the first timer is an index-datainactivtytimer (indirect-data inactivity timer).

As one embodiment, the first timer is a relay-data inactivity timer.

As an embodiment, the first timer is started (start) or restarted (re-start) when receiving a data packet belonging to the first set of logical channels.

As an embodiment, the first timer is started (start) or restarted (re-start) when sending a data packet belonging to the first set of logical channels.

As an embodiment, when receiving a data packet not belonging to the first set of logical channels, the count of the first timer is not affected.

As an embodiment, when a data packet not belonging to the first set of logical channels is transmitted, the count of the first timer is not affected.

As an embodiment, when receiving or transmitting a data packet not belonging to the first logical channel set, if the first timer is running, the first timer continues to run.

As an embodiment, when receiving or sending a data packet not belonging to the first logical channel set, if the first timer is in the off state, the first timer continues to be in the off state.

For one embodiment, the first set of logical channels includes at least one logical channel.

As an embodiment, the Data packet includes a MAC SDU (Service Data Unit).

As an embodiment, the data packet includes a MAC CE (Control Element).

As an embodiment, the first indication is sent to an upper layer in response to expiration of the first timer.

As an embodiment, the expiration of the first timer is used to trigger sending the first indication to an upper layer.

As an embodiment, the first indication is sent to an upper layer of the first node by inter-layer communication.

As an embodiment, the first indication is sent by a MAC sublayer to the upper layer.

As one embodiment, the upper layer includes an RRC layer.

As an embodiment, the upper layer includes a PC5 RRC layer.

As one embodiment, the upper layer includes a PDCP (Packet Data Convergence Protocol) sublayer.

As one embodiment, the upper layer includes an RLC sublayer.

As an embodiment, the upper layer includes a Relay Adaptation Protocol (RAP).

For one embodiment, the first indication is used to indicate that the first timer has expired.

As one embodiment, the first indication is used to release the first set of radio resources.

In one embodiment, the first set of radio resources includes at least one radio resource.

As one embodiment, each radio resource in the first set of radio resources comprises at least one layer 2 entity.

For one embodiment, the layer 2 entity comprises a MAC entity.

For one embodiment, the layer 2 entity comprises an RLC entity.

As an embodiment, the layer 2 entity includes a BAP (Backhaul Adaptation Protocol) entity.

For one embodiment, the layer 2 entity comprises a PDCP entity.

As an embodiment, the layer 2 entity includes an SDAP (Service Data Adaptation Protocol) entity.

As an embodiment, the layer 2 entity comprises a relay adaptation entity; the relay adaptation entity is used to perform bearer mapping and routing functions in relay transmissions.

For one embodiment, the one radio resource includes one MAC configuration.

As an embodiment, the one radio resource includes at least one of an RLC entity, a BAP entity, a MAC configuration, a PDCP entity, an SDAP entity, or a relay adaptation entity.

For one embodiment, the one radio resource includes all timers except T302, T320, T325, T330, T331, and T400.

As an embodiment, the one radio resource comprises a security key, which is used to encrypt data packets transmitted via the radio resource.

As an embodiment, the counting of the first timer is not affected by receiving or transmitting a data packet belonging to the second set of logical channels.

As an embodiment, when receiving or sending a data packet belonging to the second logical channel set, if the first timer is running, the first timer continues to run.

As an embodiment, when receiving or sending a data packet belonging to the second logical channel set, if the first timer is in the off state, the first timer continues to be in the off state.

As an embodiment, any two logical channels included in the first set of logical channels have different QoS (Quality of Service) characteristics.

As an embodiment, at least two logical channels included in the first set of logical channels have the same QoS characteristics.

As an embodiment, any two logical channels included in the second set of logical channels have different QoS characteristics.

As an embodiment, at least two logical channels included in the second set of logical channels have the same QoS characteristics.

As an embodiment, the first set of logical channels comprises at least one of an out (egress) Uu logical channel set or an in (ingress) Uu logical channel set of the first node; the first node is a relay node.

As a sub-embodiment of the foregoing embodiment, the second logical channel set includes at least one of an out-Uu logical channel set or an in-Uu logical channel set of the first node.

As a sub-embodiment of the above embodiment, the second set of logical channels comprises a Uu set of logical channels of the first node.

As an embodiment, the first set of logical channels comprises a Uu set of logical channels of the first node; the first node is a relay node.

As a sub-embodiment of the foregoing embodiment, the second logical channel set includes at least one of an out-Uu logical channel set or an in-Uu logical channel set in the first node.

For one embodiment, the first set of logical channels comprises at least one of an egress (egres) PC5 set of logical channels or an ingress (ingres) PC5 set of logical channels of the first node; the first node is a relay node.

As a sub-embodiment of the above embodiment, the second set of logical channels includes at least one of an out PC5 set of logical channels or an in PC5 set of logical channels of the first node.

As a sub-embodiment of the above embodiment, the second set of logical channels comprises a set of PC5 logical channels of the first node.

For one embodiment, the first set of logical channels comprises a set of PC5 logical channels for the first node; the first node is a relay node.

For one embodiment, the first set of logical channels comprises a set of PC5 logical channels for the first node; the first node is a remote node.

As an embodiment, the set of Uu logical channels is used by the first node to send data packets to a base station; the data packet is received from a remote node; the first node is a relay node.

As an embodiment, the set of Uu-in logical channels is used by the first node for receiving data packets from a base station; the data packet is forwarded to a remote node; the first node is a relay node.

As an embodiment, the Uu logical channel set is used by the first node to transmit or receive data packets to or from a base station; the first node is a sender or a target recipient of the data packet.

As an embodiment, the set of out-Uu logical channels or the set of in-Uu logical channels is used for relaying transmissions in the Uu air interface in the communication.

As an embodiment, the set of Uu logical channels is used for transmissions over a Uu air interface in non-relayed communications.

As an example, the set of outgoing PC5 logical channels or the set of incoming PC5 logical channels is used to relay transmissions in communications over the PC5 air interface.

As one embodiment, the PC5 set of logical channels is used for transmission over the PC5 air interface in non-relayed communications.

For one embodiment, the set of outgoing PC5 logical channels is used by the first node to send data packets to a first remote node; receiving the data packet from a second remote node; the first remote node and the second remote node are not co-located; the first node is a relay node.

For one embodiment, the set of ingress PC5 logical channels is used by the first node to receive data packets from a third remote node; the data packet is forwarded to a fourth remote node; the third remote node and the fourth remote node are not co-located; the first node is a relay node.

For one embodiment, the set of PC5 logical channels is used by the first node to send or receive data packets to or from a fifth remote node; the first node is a sender or a target recipient of the data packet.

As an embodiment, the first set of logical channels and the second set of logical channels are both configured to the first node.

As an embodiment, the first set of logical channels and the second set of logical channels both belong to the first node.

As an embodiment, the logical channels and the RLC channels correspond one to one; data packets transmitted through the logical channel are to be transmitted through the RLC channel; and vice versa.

As an embodiment, at least one logical channel in the first set of logical channels and at least one logical channel in the second set of logical channels are of the same logical channel type.

As an embodiment, the logical CHannel type is a DCCH (Dedicated Control CHannel).

As an embodiment, the logical CHannel type is DTCH (Dedicated Traffic CHannel).

As an embodiment, the logical CHannel type is CCCH (Common Control CHannel).

As an embodiment, the logical channel type is one of DCCH, DTCH or CCCH.

As an embodiment, the logical CHannel type is STCH (Sidelink Traffic CHannel).

As an embodiment, the logical CHannel type is SCCH (Sidelink Control CHannel).

As an embodiment, the logical channel type is one of STCH or SCCH.

As an embodiment, the logical CHannel type is SBCCH (Sidelink Broadcast Control CHannel).

As an embodiment, at least one logical channel of the first set of logical channels is associated to one radio resource of the first set of radio resources.

As an embodiment, any one of the first set of logical channels is associated to one of the first set of radio resources.

As an embodiment, a data packet transmitted through any logical channel in the first set of logical channels is processed through one radio resource in the first set of radio resources.

As an embodiment, any logical channel in the first set of logical channels is configured with a MAC configuration, and the MAC configuration is used for performing resource allocation for null transmission on a data packet transmitted through the logical channel.

As an embodiment, any Logical Channel in the first set of Logical channels is identified by one LCID (Logical Channel Identity); the LCID is used to indicate an RLC entity.

As an embodiment, any logical channel in the first set of logical channels is uniquely identified by an LCID and a source layer 2 identifier (source layer-2ID) and destination layer 2 identifier (destination layer-2ID) pair (pair); the LCID and the one source layer 2 identification and target layer 2 identification pair are used to indicate one RLC entity.

As an embodiment, any logical channel in the first set of logical channels is identified by an LCID; and the data packets transmitted through the logic channel carry the same LCID.

As an embodiment, any logical channel in the first set of logical channels is identified by an LCID; and the data packets carrying the LCID are coated by the same RLC entity.

As an embodiment, one RLC entity is associated with one DPCP entity.

As an embodiment, one RLC entity and one PDCP entity are indicated by the same radio bearer identity.

As an embodiment, the Radio Bearer identifier includes an SRB (Signaling Radio Bearer) identifier.

As an embodiment, the Radio Bearer identity includes a DRB (Data Radio Bearer) identity.

As an embodiment, one RLC entity is associated with one relay adaptation entity.

As an embodiment, any logical channel of the first set of logical channels is associated to one radio resource of the first set of radio resources; one radio resource of the first set of radio resources belongs to one radio bearer of a first set of radio bearers.

As an embodiment, the data packet transmitted through any logical channel in the first set of logical channels is transmitted through one radio bearer in the first set of radio bearers.

As an embodiment, any one of the second set of logical channels is associated to one of a second set of radio resources; one radio resource of the second set of radio resources belongs to one radio bearer of a second set of radio bearers.

As an embodiment, the data packet transmitted through any logical channel in the second set of logical channels is transmitted through one radio bearer in the second set of radio bearers.

As one embodiment, the first set of radio bearers includes at least one radio bearer.

As one embodiment, the second set of radio bearers includes at least one radio bearer.

As an embodiment, the first set of radio bearers is established over a first RRC connection.

As an embodiment, the first set of radio resources is configured by the first RRC connection.

As an embodiment, one radio bearer in the first set of radio bearers is composed of at least one of an RLC entity, a BAP entity, a MAC configuration, a PDCP entity, an SDAP entity, or a relay adaptation entity in the first set of radio resources.

As an embodiment, the Radio Bearer is a Signaling Radio Bearer (SRB).

As an embodiment, the radio bearer is signaling radio bearer 1(SRB 1).

For one embodiment, the radio bearer is signaling radio bearer 2(SRB 2).

For one embodiment, the radio bearer is signaling radio bearer 3(SRB 3).

As one embodiment, the Radio Bearer is a Data Radio Bearer (DRB).

As one embodiment, the radio bearer is indicated by a radio bearer identification.

As an embodiment, the radio bearer type in the first set of radio bearers is one of a signaling radio bearer or a data radio bearer.

As an embodiment, any one of the first set of radio bearers is used for one of transmitting traffic (traffic) or signaling.

As an embodiment, any one of the first set of radio resources is used for either transmitting traffic (traffic) or signaling.

As an embodiment, the radio bearer type in the second set of radio bearers is one of a signaling radio bearer or a data radio bearer.

As an embodiment, any one of the second set of radio bearers is used for either transport traffic (traffic) or signaling.

As an embodiment, any one of the second set of radio resources is used for either transmitting traffic (traffic) or signaling.

As one embodiment, the signaling includes RRC signaling.

As an embodiment, the signaling comprises NAS (non-access stratum) signaling.

As an embodiment, the signaling comprises PC5-S (PC5-signaling, PC5 signaling) messages.

As an embodiment, no logical channel of the second set of logical channels is associated to a radio resource of the first set of radio resources.

As an embodiment, a data packet transmitted and received through any logical channel in the second set of logical channels is not processed through one radio resource in the first set of radio resources.

As an embodiment, the data packets transmitted and received through the first set of logical channels and the data packets transmitted and received through the second set of logical channels belong to different radio bearers, respectively.

As an embodiment, the data packets transmitted and received through the first set of logical channels and the data packets transmitted and received through the second set of logical channels belong to different radio bearers established by different RRC connections, respectively.

As an embodiment, the data packets transmitted and received through the first set of logical channels and the data packets transmitted and received through the second set of logical channels are processed at different RLC entities, respectively.

As one embodiment, the LCID identifying any of the first set of logical channels and the LCID identifying any of the second set of logical channels are different.

As an embodiment, any logical channel in the first set of logical channels belongs to a first source layer 2identity and target layer 2identity pair (pair); any logical channel in the second set of logical channels belongs to a second source layer 2identity and target layer 2identity pair (pair); the first source layer 2 identification and target layer 2 identification pair (pair) and the second source layer 2 identification and target layer 2 identification pair (pair) are different.

As an example, the first source layer 2 identification and target layer 2 identification pair (pair) and the second source layer 2 identification and target layer 2 identification pair (pair) are different including: a source layer 2 identifier of the first source layer 2 identifier and target layer 2 identifier pair (pair) and a source layer 2 identifier of the second source layer 2 identifier and target layer 2 identifier pair (pair) are different; or at least one of a target layer 2 identifier in the first source layer 2 identifier and target layer 2 identifier pair (pair) and a target layer 2 identifier in the second source layer 2 identifier and target layer 2 identifier pair (pair).

As an embodiment, any logical channel in the first set of logical channels does not belong to the second set of logical channels; and vice versa.

Example 2

Embodiment 2 illustrates a network architecture diagram according to an embodiment of the present application, as shown in fig. 2. Fig. 2 illustrates a diagram of a network architecture 200 of NR 5G, LTE (Long-Term Evolution), and LTE-a (Long-Term Evolution-enhanced) systems. The NR 5G, LTE or LTE-a network architecture 200 may be referred to as a 5GS (5G System)/EPS (Evolved Packet System) 200 or some other suitable terminology. The 5GS/EPS 200 may include one or more UEs (User Equipment) 201, NG-RANs (next generation radio access networks) 202, 5 GCs (5G Core networks )/EPCs (Evolved Packet cores) 210, HSS (Home Subscriber Server)/UDMs (Unified Data Management) 220, and internet services 230. The 5GS/EPS may interconnect with other access networks, but these entities/interfaces are not shown for simplicity. As shown, the 5GS/EPS provides packet switched services, however those skilled in the art will readily appreciate that the various concepts presented throughout this application may be extended to networks providing circuit switched services or other cellular networks. The NG-RAN includes NR node b (gNB)203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gnbs 203 may be connected to other gnbs 204 via Xn interfaces (e.g., backhaul links). The XnAP protocol of the Xn interface is used to transmit control plane messages of the wireless network, and the user plane protocol of the Xn interface is used to transmit user plane data. The gNB203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (Transmission Reception Point), or some other suitable terminology, and in an NTN (Non Terrestrial/satellite Network) Network, the gNB203 may be a satellite, an aircraft, or a ground base station relayed through a satellite. The gNB203 provides the UE201 with an access point to the 5GC/EPC 210. Examples of the UE201 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a Digital audio player (e.g., MP3 player), a camera, a game console, a drone, an aircraft, a narrowband internet of things device, a machine type communication device, a terrestrial vehicle, an automobile, a vehicular device, a vehicular communication unit, a wearable device, or any other similar functioning device. UE201 may also be referred to by those skilled in the art as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. The gNB203 is connected to the 5GC/EPC210 through the S1/NG interface. The 5GC/EPC210 includes MME (Mobility Management Entity)/AMF (Authentication Management domain)/SMF (Session Management Function) 211, other MME/AMF/SMF214, S-GW (serving Gateway)/UPF (User Plane Function) 212, and P-GW (Packet data Network Gateway)/UPF 213. The MME/AMF/SMF211 is a control node that handles signaling between the UE201 and the 5GC/EPC 210. In general, the MME/AMF/SMF211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through the S-GW/UPF212, and the S-GW/UPF212 itself is connected to the P-GW/UPF 213. The P-GW provides UE IP address allocation as well as other functions. The P-GW/UPF213 is connected to the internet service 230. The internet service 230 includes an operator-corresponding internet protocol service, and may specifically include the internet, an intranet, an IMS (IP Multimedia Subsystem), and a PS (Packet Switching) streaming service.

As an embodiment, the UE201 corresponds to a first node in the present application, and the NR node B203 corresponds to a second node in the present application.

As an embodiment, the UE201 corresponds to a first node in the present application, and the UE241 corresponds to a second node in the present application.

As an embodiment, the UE241 corresponds to a first node in the present application, and the UE201 corresponds to a second node in the present application.

As an embodiment, the UE241 corresponds to a first node in the present application, and the NR node B203 corresponds to a second node in the present application.

As an example, the gNB203 is a macro Cell (Marco Cell) base station.

As an embodiment, the gNB203 is a Micro Cell (Micro Cell) base station.

As an embodiment, the gNB203 is a Pico Cell (Pico Cell) base station.

As an embodiment, the gNB203 is a home base station (Femtocell).

As an embodiment, the gNB203 is a base station device supporting a large delay difference.

As an example, the gNB203 is a flight platform device.

As an embodiment, the gNB203 is a satellite device.

As an embodiment, the gNB203 is a testing device (e.g., a transceiver simulating a function of a base station part, a signaling tester).

As an embodiment, the radio link from the UE201 to the gNB203 is an uplink, which is used to perform uplink transmissions.

As an embodiment, the radio link from the gNB203 to the UE201 is a downlink, which is used to perform downlink transmission.

As an embodiment, the wireless link between the UE201 and the UE241 is a sidelink, which is used to perform sidelink transmissions.

As an embodiment, the UE201 and the gNB203 are connected through a Uu interface.

As an embodiment, the UE241 and the gNB203 are connected through a Uu interface.

As an embodiment, the UE201 and the UE241 are connected through a PC5 interface.

Example 3

Embodiment 3 illustrates a schematic diagram of radio protocol architecture of a user plane and a control plane according to an embodiment of the present application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of radio protocol architecture for the user plane 350 and the control plane 300, fig. 3 showing the radio protocol architecture of the control plane 300 for the UE and the gNB in three layers: layer 1, layer 2 and layer 3. Layer 1(L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY 301. Layer 2(L2 layer) 305 is above PHY301, and is responsible for the link between the UE and the gNB through PHY 301. The L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the gNB on the network side. The PDCP sublayer 304 provides data ciphering and integrity protection, and the PDCP sublayer 304 also provides handover support for UEs between the gnbs. The RLC sublayer 303 provides segmentation and reassembly of packets, retransmission of missing packets by ARQ, and the RLC sublayer 303 also provides duplicate packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channel identities. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) in one cell among the UEs. The MAC sublayer 302 is also responsible for HARQ (Hybrid Automatic Repeat Request) operations. The RRC (Radio Resource Control) sublayer 306 in layer 3(L3 layer) in the Control plane 300 is responsible for obtaining Radio resources (i.e., Radio bearers) and configuring the lower layers using RRC signaling between the gNB and the UE. Although not shown, the UE may further have a V2X layer above the RRC sublayer 306 in the control plane 300, where the V2X layer is responsible for generating a PC5 QoS parameter set and a QoS rule according to received service data or a service request, and generates a PC5 QoS stream corresponding to the PC5 QoS parameter set and sends a PC5 QoS stream identifier and a corresponding PC5 QoS parameter set to an AS (Access Stratum) layer for QoS processing of a packet belonging to the PC5 QoS stream identifier by the AS layer; the V2X layer also comprises a PC5-S Signaling Protocol (PC5-Signaling Protocol) sub-layer, and the V2X layer is responsible for indicating whether each transmission of the AS layer is PC5-S transmission or V2X service data transmission. The radio protocol architecture of the user plane 350 includes layer 1(L1 layer) and layer 2(L2 layer), the radio protocol architecture in the user plane 350 is substantially the same for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 further includes a Service Data Attachment Protocol (SDAP) sublayer 356, and the SDAP sublayer 356 is responsible for mapping between QoS (Quality of Service) streams and Data Radio Bearers (DRBs) to support diversity of services. The radio protocol architecture of the UE in the user plane 350 may include part or all of the protocol sublayers of the SDAP sublayer 356, the PDCP sublayer 354, the RLC sublayer 353, and the MAC sublayer 352 at the L2 layer. Although not shown, the UE may also have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) that terminates at the P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., far end UE, server, etc.).

As an embodiment, the RLC channel includes an SAP (Service Access Point) between the RLC303 and the PDCP 304.

For one embodiment, an RLC channel includes a SAP between the RLC353 and the PDCP 354.

As an example, a logical channel (logical channel) includes a SAP between the RLC303 and the MAC 302.

For one embodiment, a logical channel includes a SAP between the RLC353 and the MAC 352.

As an embodiment, a transport channel (transport channel) includes a SAP between the MAC302 and the PHY 301.

For one embodiment, the transport channel includes a SAP between the MAC352 and the PHY 351.

As an embodiment, the entities of the sub-layers of the control plane in fig. 3 constitute an SRB (Signaling Radio Bearer) in the vertical direction.

As an embodiment, entities of a plurality of sub-layers of the user plane in fig. 3 constitute a DRB (Data Radio Bearer) in a vertical direction.

As an example, the wireless protocol architecture in fig. 3 is applicable to the first node in the present application.

As an example, the wireless protocol architecture in fig. 3 is applicable to the second node in the present application.

As an embodiment, the first indication in this application is generated in the MAC 302.

As an embodiment, the first indication in this application is generated in the MAC 352.

As an embodiment, the first signaling in this application is generated in the RRC 306.

As an embodiment, the first signaling in this application is generated in the MAC 302.

As an embodiment, the first signaling in this application is generated in the MAC 352.

As an example, the

L2 level

305 or 355 belongs to a higher level.

As an embodiment, the RRC sublayer 306 in the L3 layer belongs to a higher layer.

Example 4

Embodiment 4 illustrates a hardware module schematic diagram of a communication device according to an embodiment of the present application, as shown in fig. 4. Fig. 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

The first communications device 450 includes a controller/processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter/receiver 454, and an antenna 452.

The second communication device 410 includes a controller/processor 475, a memory 476, a data source 477, a receive processor 470, a transmit processor 416, a multiple antenna receive processor 472, a multiple antenna transmit processor 471, a transmitter/receiver 418, and an antenna 420.

In transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, an upper layer data packet from a core network or an upper layer data packet from a data source 477 is provided to the controller/processor 475. The core network and data source 477 represents all protocol layers above the L2 layer. The controller/processor 475 implements the functionality of layer L2. In transmissions from the second communications device 410 to the first communications device 450, the controller/processor 475 provides for header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communications device 450 based on various priority metrics. The controller/processor 475 is also responsible for retransmission of lost packets, and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate Forward Error Correction (FEC) at the second communication device 410, as well as mapping of signal constellation based on various modulation schemes (e.g., Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based precoding and non-codebook based precoding, and beamforming processing on the coded and modulated symbols to generate one or more spatial streams. Transmit processor 416 then maps each spatial stream to subcarriers, multiplexes with reference signals (e.g., pilots) in the time and/or frequency domain, and then uses an Inverse Fast Fourier Transform (IFFT) to generate the physical channels carrying the time-domain multicarrier symbol streams. The multi-antenna transmit processor 471 then performs transmit analog precoding/beamforming operations on the time domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream that is then provided to a different antenna 420.

In a transmission from the second communications apparatus 410 to the first communications apparatus 450, each receiver 454 receives a signal through its respective antenna 452 at the first communications apparatus 450. Each receiver 454 recovers information modulated onto a radio frequency carrier and converts the radio frequency stream into a baseband multi-carrier symbol stream that is provided to a receive processor 456. Receive processor 456 and multi-antenna receive processor 458 implement the various signal processing functions of the L1 layer. A multi-antenna receive processor 458 performs receive analog precoding/beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. Receive processor 456 converts the received analog precoded/beamformed baseband multicarrier symbol stream from the time domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signals and the reference signals to be used for channel estimation are demultiplexed by the receive processor 456, and the data signals are subjected to multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial streams destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered at a receive processor 456 and soft decisions are generated. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communications device 410 on the physical channel. The upper layer data and control signals are then provided to a controller/processor 459. The controller/processor 459 implements the functionality of the L2 layer. The controller/processor 459 may be associated with a memory 460 that stores program codes and data. Memory 460 may be referred to as a computer-readable medium. In transmissions from the second communications device 410 to the first communications device 450, the controller/processor 459 provides multiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover higher layer packets from the second communications device 410. The upper layer packet is then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing.

In a transmission from the first communications device 450 to the second communications device 410, an upper layer data packet is provided at the first communications device 450 to a controller/processor 459 using a data source 467. The data source 467 represents all protocol layers above the L2 layer. Similar to the send function at the second communications apparatus 410 described in the transmission from the second communications apparatus 410 to the first communications apparatus 450, the controller/processor 459 performs header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels, performing L2 layer functions for the user plane and control plane. The controller/processor 459 is also responsible for retransmission of lost packets and signaling to said second communications device 410. A transmit processor 468 performs modulation mapping, channel coding, and digital multi-antenna spatial precoding by a multi-antenna transmit processor 457 including codebook-based precoding and non-codebook based precoding, and beamforming, and the transmit processor 468 then modulates the resulting spatial streams into multi-carrier/single-carrier symbol streams, which are provided to different antennas 452 via a transmitter 454 after analog precoding/beamforming in the multi-antenna transmit processor 457. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream and provides the radio frequency symbol stream to the antenna 452.

In a transmission from the first communication device 450 to the second communication device 410, the functionality at the second communication device 410 is similar to the receiving functionality at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives rf signals through its respective antenna 420, converts the received rf signals to baseband signals, and provides the baseband signals to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multiple antenna receive processor 472 collectively implement the functionality of the L1 layer. Controller/processor 475 implements the L2 layer functions. The controller/processor 475 can be associated with a memory 476 that stores program codes and data. Memory 476 may be referred to as a computer-readable medium. In transmission from the first communication device 450 to the second communication device 410, the controller/processor 475 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the first communication device 450. Upper layer packets from the controller/processor 475 may be provided to the core network or all protocol layers above the L2 layer, and various control signals may also be provided to the core network or L3 for L3 processing.

As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code configured to, for use with the at least one processor, the first communication device 450 apparatus at least: maintaining a first timer; sending a first indication to an upper layer in response to expiration of the first timer; the first indication is used to release a first set of radio resources; wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity; the action maintaining the first timer includes: starting or restarting the first timer when receiving a data packet belonging to a first set of logical channels; starting or restarting the first timer when transmitting a data packet belonging to the first logical channel set; the counting of the first timer is not influenced by receiving or sending a data packet belonging to a second logical channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to a radio resource of the first set of radio resources, none of the logical channels of the second set of logical channels is associated to a radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to the first node.

As an embodiment, the first communication device 450 apparatus includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: maintaining a first timer; sending a first indication to an upper layer in response to expiration of the first timer; the first indication is used to release a first set of radio resources; wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity; the action maintaining the first timer includes: starting or restarting the first timer when receiving a data packet belonging to a first set of logical channels; starting or restarting the first timer when transmitting a data packet belonging to the first logical channel set; the counting of the first timer is not influenced by receiving or sending a data packet belonging to a second logical channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to a radio resource of the first set of radio resources, none of the logical channels of the second set of logical channels is associated to a radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to the first node.

As an embodiment, the second communication device 410 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured for use with the at least one processor. The second communication device 410 means at least: receiving first signaling, the first signaling being used to indicate a release of a first set of radio resources; wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity; in response to expiration of the first timer, a first indication is sent to an upper layer; the first indication is used to release the first set of radio resources, the first indication being used to trigger the first signaling; said first timer is started or restarted when a data packet belonging to a first set of logical channels is received; said first timer is started or restarted when a data packet belonging to said first set of logical channels is transmitted; the counting of the first timer is not influenced by the receiving or sending of a data packet belonging to a second logical channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to a radio resource of the first set of radio resources, none of the logical channels of the second set of logical channels is associated to a radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to a sender of the first signaling.

As an embodiment, the second communication device 410 apparatus includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: receiving first signaling, the first signaling being used to indicate a release of a first set of radio resources; wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity; in response to expiration of the first timer, a first indication is sent to an upper layer; the first indication is used to release the first set of radio resources, the first indication being used to trigger the first signaling; said first timer is started or restarted when a data packet belonging to a first set of logical channels is received; said first timer is started or restarted when a data packet belonging to said first set of logical channels is transmitted; the counting of the first timer is not influenced by the receiving or sending of a data packet belonging to the second logical channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to a radio resource of the first set of radio resources, none of the logical channels of the second set of logical channels is associated to a radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to a sender of the first signaling.

As an embodiment, the first communication device 450 corresponds to a first node in the present application, and the second communication device 410 corresponds to a second node in the present application.

For one embodiment, the first communication device 450 is a relay node.

For one embodiment, the first communication device 450 is a UE.

For one embodiment, the first communication device 450 is an RSU.

For one embodiment, the second communication device 410 is a base station.

For one embodiment, the second communication device 410 is an RSU.

For one embodiment, the second communication device 410 is a UE.

For one embodiment, the second communication device 410 is a relay node.

For one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, or the controller/processor 459 is configured to transmit a first indication herein.

For one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, or the controller/processor 459 is configured to transmit first signaling in accordance with the present disclosure.

For one embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470 or the controller/processor 475 is configured to receive the first signaling.

Example 5

Embodiment 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in fig. 5. In FIG. 5, the first node U1 and the second node U2 communicate over an air interface. The steps in the dashed box F0 are optional. It is specifically noted that the order in this example does not limit the order of signal transmission and the order of implementation in this application.

For theFirst node U1Maintaining the first timer in step S11; determining that the first timer has expired in step S12; transmitting a first indication to an upper layer in step S13; transmitting a first signaling in step S14; the first set of radio resources is released in step S15.

For theSecond node U2Receiving a first signaling in step S21; part of the layer 2 entity in the first set of radio resources is released in step S22.

In one embodiment, the first set of radio resources is released in response to receiving the first indication.

As an embodiment, the upper layer receives the first indication, triggering the release of the first set of radio resources.

As an embodiment, any one of the first set of radio resources belongs to the first node.

As an embodiment, at least one radio resource in the first set of radio resources does not belong to the first node.

As an embodiment, any layer 2 entity in the first set of radio resources belongs to the first node.

As an embodiment, at least one layer 2 entity in the first set of radio resources does not belong to the first node.

In one embodiment, the first RRC connection is released in response to receiving the first indication.

In one embodiment, the radio bearer established by the first RRC connection is released in response to receiving the first indication.

In one embodiment, the radio resources included in the radio bearer established by the first RRC connection are released in response to receiving the first indication.

As an embodiment, the upper layer receives the first indication, indicates the release of the first RRC connection to a higher layer and indicates a reason for the release of the first RRC connection.

As an embodiment, the upper layer includes a NAS layer.

As one example, the upper layer includes a V2X layer.

As one embodiment, the upper layer includes an application layer.

As an embodiment, the first indication is used to trigger the first signaling.

As an embodiment, the upper layer receives the first indication, triggering generation of the first signaling.

As an embodiment, the first signaling is higher layer signaling.

As an embodiment, the first signaling is RRC signaling.

As an embodiment, the first signaling is PC5 RRC signaling.

As an embodiment, the name of the first signaling includes rrcreelease (RRC release).

As an embodiment, the first signaling includes all or part of IE (Information Element) in an RRC signaling.

As an embodiment, the first signaling comprises all or part of a Field (Field) in an IE in an RRC signaling.

As an embodiment, the first signaling is MAC sublayer signaling.

As an embodiment, the first signaling includes all or part of a field in a MAC sublayer signaling.

As an embodiment, the first signaling is carried in one MAC CE.

As an embodiment, the first signaling is carried in UCI (Uplink Control Information).

As an embodiment, the first signaling is carried in SCI (Sidelink Control Information).

As an embodiment, the first signaling comprises 1 bit.

As an embodiment, the first signaling is sent over an air interface.

As an embodiment, the first signaling is sent over a wireless interface.

As an embodiment, the first signaling is sent over an uplink.

As an embodiment, the first signaling is sent over a sidelink.

As an embodiment, any layer 2 entity in the first set of radio resources belongs to the receiver of the first signaling.

As an embodiment, at least one layer 2 entity in the first set of radio resources does not belong to the first node; the at least one layer 2 entity belongs to a recipient of the first signaling.

As an embodiment, in response to receiving the first signaling, the recipient of the first signaling releases a portion of a layer 2 entity in the first set of radio resources.

As an embodiment, any layer 2 entity in the first set of radio resources belongs to one of the radio resources; the radio resource includes a plurality of layer 2 entities, at least two layer 2 entities of the plurality of layer 2 entities belong to the first node and the second node, respectively, and all layer 2 entities in the radio resource belong to one radio bearer.

As a sub-embodiment of the foregoing embodiment, the releasing part of the layer 2 entity in the first set of radio resources includes releasing a layer 2 entity belonging to the second node in the first set of radio resources.

As an embodiment, the one radio resource includes at least one of at least one RLC entity, at least one MAC configuration, a PDCP entity, an SDAP entity, or a relay adaptation entity.

As an embodiment, any layer 2 entity of the plurality of layer 2 entities belongs to one of the first node and the second node.

As an embodiment, the first signaling is used by the recipient of the first signaling to determine a release of a third set of radio resources, the third set of radio resources including at least one of the radio resources; each radio resource in the third set of radio resources comprises at least one layer 2 entity; the third set of radio resources belongs to the recipient of the first signaling.

As an embodiment, any layer 2 entity in the third set of radio resources belongs to one radio bearer with at least one layer 2 entity in the first set of radio resources.

For one embodiment, the third set of radio resources is a subset of the first set of radio resources.

As one embodiment, the third set of radio resources includes a portion of a layer 2 entity in the first set of radio resources.

As an embodiment, any layer 2 entity in the third set of radio resources belongs to the receiver of the first signaling.

As an embodiment, any layer 2 entity in the first set of radio resources belongs to the sender of the first signaling.

Example 6

Embodiment 6 illustrates a first node processing flow diagram according to an embodiment of the present application, as shown in fig. 6. The steps of fig. 6 are performed at the first node.

In embodiment 6, in step S601, a packet is received; judging whether the data packet belongs to a first logic channel set in step S603, if so, executing step S604, otherwise, jumping to step S607, and ending; in step S604, it is determined whether the first timer is running, if not, step S605 is executed, and if so, step S606 is skipped; in step S605, a first timer is started; in step S606, the first timer is restarted. It should be noted that, taking receiving a data packet as an example, when sending a data packet, sending a data packet in step S602, and the flow after step S602 is the same as the flow for receiving a data packet, and is not described herein again.

As an embodiment, a data packet is received or sent, and the LCID of the data packet is used to determine whether the data packet belongs to the first logical channel set.

As an embodiment, a packet is received or sent, and the LCID and source layer 2 identification and destination layer 2 identification pair (pair) of the packet is used to determine whether the packet belongs to the first logical channel set.

As an embodiment, a data packet is received or sent, and when the LCID of the data packet indicates one logical channel in the first logical channel set, the data packet belongs to the first logical channel set; when the LCID of the data packet does not indicate any logical channel in the first set of logical channels, the data packet does not belong to the first set of logical channels.

As an embodiment, a packet is received or sent, the packet belongs to the first logical channel set when the LCID of the packet and a source layer 2 identification and destination layer 2 identification pair (pair) indicate one logical channel in the first logical channel set; the packet does not belong to the first set of logical channels when the packet's LCID and source layer 2 identification and target layer 2 identification pair (pair) does not indicate one of the first set of logical channels.

As an embodiment, a data packet is received or sent, and the data packet belongs to the first logical channel set when the LCID of the data packet indicates an RLC entity in the first radio resource set; when the LCID of the data packet does not indicate any RLC entity in the first set of radio resources, the data packet does not belong to the first set of logical channels.

As an embodiment, a data packet is received or sent, the data packet belonging to the first set of logical channels when an LCID of the data packet and a source layer 2identity and target layer 2identity pair (pair) indicate one RLC entity in the first set of radio resources; the packet does not belong to the first set of logical channels when the LCID and Source layer 2 identification and target layer 2 identification pair (pair) of the packet does not indicate any RLC entity in the first set of radio resources.

As an embodiment, the data packet is a MAC SDU, and the LCID of the data packet is carried in a MAC subheader corresponding to the MAC SDU.

As an embodiment, the data packet is a MAC SDU, and an LCID of the data packet is carried in a MAC subheader corresponding to the MAC SDU; part of bits of the source layer 2id and target layer 2id pair (pair) are carried in a SL-SCH (Sidelink-Shared CHannel) MAC subheader, and the remaining part of bits of the source layer 2id and target layer 2id pair (pair) are carried in SCI.

As one embodiment, starting or restarting the first timer includes the first timer counting from an initial value.

Example 7

Embodiment 7 illustrates a flow diagram for maintaining a first timer according to an embodiment of the present application, as shown in fig. 7. The steps of fig. 7 are performed at the first node.

In embodiment 7, in step S701, a first timer is started; updating a first timer at each first time interval in step S702; in step S703, determining whether the first timer expires, if yes, executing step S704, and if no, jumping back to step S702; in step S704, the first timer is stopped, and a first indication is sent to the upper layer.

As an embodiment, the first information is higher layer information.

As an embodiment, the first information is downlink information.

As an embodiment, the first information is RRC information.

As an embodiment, the first information is PC5 RRC information.

As an embodiment, the first Information is included in all or part of IE (Information Element) in an RRC signaling.

As an embodiment, the first information includes all or part of a Field (Field) in an IE in an RRC signaling.

As an example, the name of the first information includes MAC-CellGroupConfig (access control-cell group configuration per day).

As one embodiment, the MAC sublayer of the first node receives the first information from an upper layer of the first node.

As an embodiment, the first information includes configuration information of the first timer.

As one embodiment, the first information includes the first expiration value of the first timer.

As an embodiment, the first outdated value is configurable.

As one embodiment, the first expiration value is pre-configured (pre-configured).

As one embodiment, the first expiration value is a fixed value.

As an embodiment, the first expiration value is a value not less than 1.

As an embodiment, the first expiration value is a positive integer not less than 1.

As one embodiment, the first expiration value is a positive integer no greater than 180.

As an embodiment, the first expiration value is expressed in milliseconds.

As one embodiment, the first expiration value is expressed in subframes.

As an embodiment, the first expiration value is expressed in time slots.

As one embodiment, the first node starting or restarting the first timer includes setting an initial value of the first timer to 0.

As one embodiment, the phrase maintaining the first timer includes: when the value of the first timer is less than the first expiration value, the value of the first timer is incremented by 1 every one of the first time intervals.

As one embodiment, the phrase maintaining the first timer includes: stopping the first timer when the value of the first timer equals the first expiration value.

For one embodiment, the first timer expires when the value of the first timer equals the first expiration value.

As one embodiment, the first node starting or restarting the first timer includes setting an initial value of the first timer to the first expiration value.

As one embodiment, the phrase maintaining the first timer includes: subtracting 1 from the value of the first timer every one of the first time intervals when the value of the first timer is greater than 0.

As one embodiment, the phrase maintaining the first timer includes: stopping the first timer when the value of the first timer equals 0.

As one embodiment, the first timer expires when its value equals 0.

As one example, the first time interval is 1 millisecond.

As an embodiment, the first time interval comprises a duration of 1 subframe.

As an embodiment, the first time interval comprises a duration of 1 time slot.

Example 8

Embodiment 8 illustrates a relationship diagram of a first logical channel set and a second logical channel set according to an embodiment of the present application, as shown in fig. 8.

As an embodiment, the transmission of data traffic on the first set of logical channels and the second set of logical channels is provided by one MAC entity.

As an embodiment, any one of the first and second logical channel sets is used to indicate a SAP of one RLC entity and MAC entity.

As an embodiment, the MAC entity uploads a data packet transmitted through one of the first set of logical channels to one RLC entity belonging to the first set of radio resources for processing.

As an embodiment, the MAC entity uploads a data packet transmitted through one of the second set of logical channels to one RLC entity belonging to the second set of radio resources for processing.

In fig. 8, the first set of radio resources includes at least RLC entity 1, RLC entity 2, …, RLC entity n; the second set of radio resources comprises at least RLC entity n +1, RLC entity n +2, …, RLC entity n + m.

Example 9

Embodiment 9 illustrates a schematic diagram of a wireless protocol architecture for relay transmission according to an embodiment of the present application, as shown in fig. 9.

In fig. 9, in the relay transmission, taking the example that data is sent from the third node to the second node through the first node (the same principle can be obtained that data is sent from the second node to the third node through the first node): the first target Data is processed by the PDCP sublayer 905 and the RLC sublayer 903 in sequence at the third node side to generate a first target MAC PDU (Protocol Data Unit) in the MAC sublayer 902, and then the first target MAC PDU is transmitted to the PHY layer 901, and then transmitted to the PHY layer 911 of the first node through the air interface, and then the first target Data is restored by processing by the MAC sublayer 912 and the RLC sublayer 913 in sequence; the first RLC data is processed by the RAP sublayer 924, and then regenerated into second RLC data in the RLC sublayer 923, and then processed by the MAC sublayer 922, and a second target MAC PDU is generated and transmitted to the PHY layer 921; and then the data is transmitted to a PHY layer 931 of the second node through an air interface, and then the second target MAC PDU is recovered through a MAC sublayer 932, and then the first target data is recovered through processing of a RLC sublayer 933, a RAP sublayer 934 and a PDCP sublayer 935 in sequence.

As an embodiment, at least one logical channel of the third set of logical channels is associated to one radio resource of the first set of radio resources.

As an embodiment, any logical channel of the third set of logical channels is associated to one radio resource of the first set of radio resources.

As an embodiment, the data packet transmitted through any one of the third set of logical channels is transmitted through one of the first set of radio resources.

As an embodiment, any logical channel in the third set of logical channels is configured with a MAC configuration, and the MAC configuration is used to allocate a null transmission resource to a data packet transmitted through the logical channel.

As an embodiment, any logical channel in the third set of logical channels is identified by an LCID; the one LCID indicates one RLC entity.

As an embodiment, any logical channel in the third set of logical channels is uniquely determined by one LCID and one source layer 2 identifier (source layer-2ID) and destination layer 2 identifier (destination layer-2ID) pair (pair); the one LCID identification and the one source layer 2 identification and target layer 2 identification pair indicate one RLC entity.

As an embodiment, any logical channel in the third set of logical channels is identified by an LCID; and the data packet carrying the LCID is processed by the same RLC entity.

As an embodiment, any logical channel in the third set of logical channels is mapped to one logical channel in the first set of logical channels.

As an embodiment, one RLC channel corresponding to any one logical channel in the third logical channel set is mapped to one RLC channel corresponding to one logical channel in the first logical channel set.

As an embodiment, any logical channel in the third set of logical channels and one logical channel mapped to the first set of logical channels belong to one radio bearer.

As an embodiment, any logical channel in the third set of logical channels and the logical channel are mapped to one radio bearer corresponding to one logical channel in the first set of logical channels.

As a sub-embodiment of the two embodiments, any logical channel in the third logical channel set is an outgoing logical channel; one logical channel in the first logical channel set is an incoming logical channel.

As a sub-embodiment of the two embodiments, any logical channel in the third logical channel set is an incoming logical channel; one logical channel in the first set of logical channels is an outgoing logical channel.

As a sub-embodiment of the two embodiments, an RLC channel corresponding to any one logical channel in the third logical channel set is an outgoing RLC channel; and the RLC channel corresponding to one logical channel in the first logical channel set is an incoming RLC channel.

As a sub-embodiment of the two embodiments, an RLC channel corresponding to any logical channel in the third logical channel set is an incoming RLC channel; and the RLC channel corresponding to any one of the first logical channels is an outgoing RLC channel.

For one embodiment, the input logical channel includes at least one of an input Uu logical channel or an input PC5 logical channel.

For one embodiment, the outgoing logical channel includes at least one of an outgoing Uu logical channel or an outgoing PC5 logical channel.

As an embodiment, at least one logical channel of the first set of logical channels is mapped to one logical channel of the third set of logical channels.

As an embodiment, at least one logical channel of the third set of logical channels is mapped to one logical channel of the first set of logical channels.

As an embodiment, the first set of logical channels and the third set of logical channels are both configured to the first node.

As a sub-embodiment of the foregoing embodiment, the first node is a relay node.

As a sub-embodiment of the above embodiment, the first and third sets of logical channels are used to implement transmission of data packets on two air interfaces of the relay node, respectively.

As an embodiment, the radio resource associated with the first logical channel set and the radio resource associated with the third logical channel set both belong to the first node.

In fig. 9, the data packet processed by the RLC entity 913 belongs to one logical channel in the first logical channel set, and the data packet processed by the RLC entity 923 belongs to one logical channel in the third logical channel set; the data packet processed by the RLC entity 913 is mapped to the RLC entity 923 after being processed by a RAP (Relay Adaptation Protocol) sublayer.

As an embodiment, the RAP sublayer implements a Bearer mapping (Bearer mapping) function.

For one embodiment, the bearer mapping function maps the third logical channel to the first logical channel; the third logical channel is one logical channel in the third logical channel set; the first logical channel is one logical channel in the first logical channel set.

As an embodiment, the third logical channel and the first logical channel belong to one radio bearer.

As an embodiment, the third logical channel and the first logical channel correspond to a radio bearer.

As an embodiment, the third logical channel and the first logical channel are configured by two RRC connections.

As an embodiment, at least one of the third logical channel or the first logical channel is configured by a PC5 RRC connection.

As an embodiment, the first set of radio resources is configured by a second RRC connection and a third RRC connection.

As an embodiment, the second RRC connection is used to configure the first set of logical channels; the third RRC connection is used to configure the third set of logical channels.

As an embodiment, the first RRC connection and the third RRC connection are released separately in response to sending the first signaling.

As an embodiment, the bearer mapping function maps the third RLC channel to the first RLC channel; the third RLC channel is an RLC channel corresponding to one logical channel in the third logical channel set; the first RLC channel is an RLC channel corresponding to one logical channel in the first logical channel set.

As an embodiment, the third RLC channel and the first RLC channel belong to one radio bearer.

As an embodiment, the third RLC channel and the first RLC channel correspond to one radio bearer.

As an embodiment, the RAP sublayer implements Routing (Routing) functionality.

In fig. 9, the routing function forwards packets received from the third node to the second node.

As an embodiment, a packet generates a RAP PDU in the RAP sublayer; the RAP PDU comprises an RAP head and an RAP SDU indicated by the RAP head; and the RAP SDU is an RLC SDU.

As an embodiment, the RAP header includes a source sender identification of a RAP SDU indicated by the RAP header.

As an embodiment, the RAP header includes a target recipient identification for the RAP SDU indicated by the RAP header.

As an embodiment, the RAP header includes a radio bearer identity to which a RAP SDU indicated by the RAP header belongs.

As an embodiment, the RAP header includes a sequence number of a RAP SDU indicated by the RAP header.

In fig. 9, the third node is a base station, the second node is a user equipment, and the first node is a relay node.

In fig. 9, the third node is a user equipment, the second node is a user equipment, and the first node is a relay node.

In fig. 9, the third node is a user equipment, the second node is a base station, and the first node is a relay node.

Example 10

Embodiment 10 illustrates a block diagram of a processing apparatus in a first node according to an embodiment of the present application, as shown in fig. 10. In fig. 10, a first node processing apparatus 1000 includes a first receiver 1001 and a first transmitter 1002. The first receiver 1001 includes at least one of the transmitter/receiver 454 (including the antenna 452), the receive processor 456, the multiple antenna receive processor 458, or the controller/processor 459 of fig. 4 herein; the first transmitter 1002 may include at least one of the transmitter/receiver 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457, or the controller/processor 459 of fig. 4.

In embodiment 10, a first receiver 1001, maintains a first timer; a first transmitter 1002, configured to send a first indication to an upper layer in response to expiration of the first timer; the first indication is used to release a first set of radio resources; wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity; the action maintaining the first timer includes: starting or restarting the first timer when receiving a data packet belonging to a first set of logical channels; starting or restarting the first timer when transmitting a data packet belonging to the first logical channel set; the counting of the first timer is not influenced by receiving or sending a data packet belonging to a second logical channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to a radio resource of the first set of radio resources, none of the logical channels of the second set of logical channels is associated to a radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to the first node.

As an embodiment, the first receiver 1001, in response to receiving the first indication, releases the first set of radio resources.

The first transmitter 1002, as an embodiment, transmits a first signaling; wherein the first indication is used to trigger the first signaling used to indicate the release of the first set of radio resources.

As an embodiment, at least one logical channel of a third set of logical channels is associated to one radio resource of the first set of radio resources; wherein any logical channel in the third set of logical channels is mapped to one logical channel in the first set of logical channels; the first set of logical channels and the third set of logical channels are both configured to the first node.

For one embodiment, the first receiver 1001 receives first information indicating a first expiration value of the first timer; wherein the first timer is updated every first time interval while the first timer is running.

Example 11

Embodiment 11 is a block diagram illustrating a processing apparatus in a second node according to an embodiment of the present application, as shown in fig. 11. In fig. 11, a second node processing apparatus 1100 comprises a second receiver 1101. The second receiver 1101 includes at least one of the transmitter/receiver 418 (including the antenna 420), the receive processor 470, the multiple antenna receive processor 472, or the controller/processor 475 of fig. 4 of the present application.

In embodiment 11, a second receiver 1101 receives a first signaling used to indicate a release of a first set of radio resources; wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity; in response to expiration of the first timer, a first indication is sent to an upper layer; the first indication is used to release the first set of radio resources, the first indication being used to trigger the first signaling; said first timer is started or restarted when a data packet belonging to a first set of logical channels is received; said first timer is started or restarted when a data packet belonging to said first set of logical channels is transmitted; the counting of the first timer is not influenced by the receiving or sending of a data packet belonging to the second logical channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to a radio resource of the first set of radio resources, none of the logical channels of the second set of logical channels is associated to a radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to a sender of the first signaling.

As an embodiment, the second receiver 1101, in response to receiving the first signaling, releases a portion of layer 2 entities in the first set of radio resources.

As an embodiment, at least one logical channel of a third set of logical channels is associated to one radio resource of the first set of radio resources; wherein any logical channel in the third set of logical channels is mapped to one logical channel in the first set of logical channels; the first set of logical channels and the third set of logical channels are both configured to the sender of the first signaling.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The first Type of Communication node or UE or terminal in the present application includes, but is not limited to, a mobile phone, a tablet computer, a notebook, a network card, a low power consumption device, an eMTC (enhanced Machine Type Communication) device, an NB-IoT device, a vehicle-mounted Communication device, an aircraft, an airplane, an unmanned aerial vehicle, a remote control plane, and other wireless Communication devices. The second type of communication node, base station or network side device in this application includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, an eNB, a gNB, a Transmission and Reception node TRP (Transmission and Reception Point), a relay satellite, a satellite base station, an air base station, and other wireless communication devices.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A first node configured for wireless communication, comprising:

a first receiver to maintain a first timer;

wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity; the behavior maintaining the first timer includes: starting or restarting the first timer when receiving a data packet belonging to a first set of logical channels; starting or restarting the first timer when transmitting a data packet belonging to the first logical channel set; the counting of the first timer is not influenced by receiving or sending a data packet belonging to a second logic channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to one radio resource of the first set of radio resources, and none of the logical channels of the second set of logical channels is associated to one radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to the first node.

2. The first node of claim 1, comprising:

the first receiver, in response to receiving the first indication, releases the first set of radio resources.

3. The first node according to claim 1 or 2, comprising:

the first transmitter transmits a first signaling;

4. The first node according to any of claims 1-3, characterized in that at least one logical channel of a third set of logical channels is associated to one radio resource of the first set of radio resources;

5. The first node according to any of claims 1 to 4, comprising:

the first receiver receiving first information indicating a first expiration value of the first timer;

6. A second node configured for wireless communication, comprising:

wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity; in response to expiration of the first timer, a first indication is sent to an upper layer; the first indication is used to release the first set of radio resources, the first indication being used to trigger the first signaling; said first timer is started or restarted when a data packet belonging to a first set of logical channels is received; when a data packet belonging to the first set of logical channels is transmitted, the first timer is started or restarted; the counting of the first timer is not influenced by the receiving or sending of a data packet belonging to the second logical channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to one radio resource of the first set of radio resources, and none of the logical channels of the second set of logical channels is associated to one radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to a sender of the first signaling.

7. The second node of claim 6, comprising:

the second receiver, in response to receiving the first signaling, releases a part of layer 2 entities in the first set of radio resources.

8. Second node according to claim 6 or 7, characterized in that at least one logical channel of a third set of logical channels is associated to one radio resource of said first set of radio resources;

9. A method in a first node used for wireless communication, comprising:

maintaining a first timer;

wherein the first set of radio resources comprises at least one radio resource, each radio resource in the first set of radio resources comprising at least one layer 2 entity; the behavior maintaining the first timer includes: starting or restarting the first timer when receiving a data packet belonging to a first set of logical channels; starting or restarting the first timer when transmitting a data packet belonging to the first logical channel set; the counting of the first timer is not influenced by receiving or sending a data packet belonging to a second logical channel set; at least one logical channel in the first logical channel set and at least one logical channel in the second logical channel set have the same logical channel type; at least one logical channel of the first set of logical channels is associated to a radio resource of the first set of radio resources, none of the logical channels of the second set of logical channels is associated to a radio resource of the first set of radio resources; the first set of logical channels and the second set of logical channels are both configured to the first node.

10. A method in a second node used for wireless communication, comprising: